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United States Patent | 5,608,709 |
Okuda ,   et al. | March 4, 1997 |
A recording/reproducing apparatus incorporates a beam splitter arrangement that directs stray reflected light away from the incident and exit paths. The beam splitter is arranged such that refracting surfaces are angled away from a 45 degree angle by an amount corresponding to a refracted angle of an incident beam. The entire beam splitter is arranged in the recording/reproducing apparatus such that the refracted beam is refracted by a predetermined angle based on the known refractive index of the beam splitter prisms and the orientation of the beam splitter.
Inventors: | Okuda; Isao (Tokyo, JP); Shinozaki; Shimpei (Tokyo, JP); Kanazawa; Hiroshi (Tokyo, JP); Takishima; Suguru (Tokyo, JP) |
Assignee: | Asahi Kogaku Kogyo Kabushiki Kaisha (Tokyo, JP) |
Appl. No.: | 334071 |
Filed: | November 4, 1994 |
Nov 06, 1993[JP] | 5-300874 |
Current U.S. Class: | 369/112.21; 369/13.32; 369/44.14; 369/118 |
Intern'l Class: | G11B 007/00 |
Field of Search: | 369/13,44.14,112,114,115,116,117,118,119 360/114,59 |
4553229 | Nov., 1985 | Wakamiya | 369/110. |
4764912 | Aug., 1988 | Ando et al. | 369/13. |
5099470 | Mar., 1992 | Matsubayashi | 369/13. |
5105399 | Apr., 1992 | Shimonou | 369/13. |
5122217 | Jun., 1992 | Sugahara | 359/900. |
5223983 | Jun., 1993 | Oono et al. | 359/834. |
5293371 | Mar., 1994 | Koyama | 369/13. |
5321550 | Jun., 1994 | Maruyama et al. | 369/112. |
5353274 | Oct., 1994 | Nishikawa | 369/13. |